Definition of toll. 1  transitive verb. 2  1 : to sound (a bell) by pulling the rope. 3  2a : to give signal or announcement of the clock tolled each hourb : to announce by tolling church bells tolled the death of the bishopc : to call to or from a place or occasion bells tolled the congregation to church.  intransitive verb.
The formula that this water intake calculator uses is that for every pound of body weight you need 0.5 ounces of fluid intake per day. Therefore if your body weight is 200 Pounds, you would need 100 ounces of fluid.
Also, if the animal is lactating, water requirements also increase. Following are some thumb rules on water intake that may be helpful. Daily water intake may vary from 3 to 30 gallons per day depending on age, body size (weight), stage of production, and the environment (mainly air temperature).